motor                  package:boot                  R Documentation

_D_a_t_a _f_r_o_m _a _S_i_m_u_l_a_t_e_d _M_o_t_o_r_c_y_c_l_e _A_c_c_i_d_e_n_t

_D_e_s_c_r_i_p_t_i_o_n:

     The 'motor' data frame has 94 rows and 4 columns.  The rows are
     obtained by removing replicate values of 'time' from the dataset 
     'mcycle'.  Two extra columns are added to allow for strata with a
     different residual variance in each stratum.

_U_s_a_g_e:

     data(motor)

_F_o_r_m_a_t:

     This data frame contains the following columns:

     '_t_i_m_e_s' The time in milliseconds since impact.

     '_a_c_c_e_l' The recorded head acceleration (in g).

     '_s_t_r_a_t_a' A numeric column indicating to which of the three strata
          (numbered 1, 2 and 3) the observations belong.

     '_v' An estimate of the residual variance for the observation.  'v'
          is constant within the strata but a different estimate is
          used for each of the three strata.

_S_o_u_r_c_e:

     The data were obtained from

     Silverman, B.W. (1985) Some aspects of the spline smoothing
     approach to non-parametric curve fitting.  _Journal of the Royal
     Statistical Society, B_, *47*, 1-52.

_R_e_f_e_r_e_n_c_e_s:

     Davison, A.C. and Hinkley, D.V. (1997)  _Bootstrap Methods and
     Their Application_. Cambridge University Press.

     Venables, W.N. and Ripley, B.D. (1994)  _Modern Applied Statistics
     with S-Plus_. Springer-Verlag.

_S_e_e _A_l_s_o:

     'mcycle'

